Bourn said he's not worried about the hamstring injury lingering all season because it's in a different spot than last year. Bourn had surgery on his left hamstring last year.
"We're looking to keep him healthy," manager Rick Renteria said.
Detwiler is 0-1 with a 6.43 ERA and 2.14 WHIP in three spring starts. He missed most of last season due to a back injury.